Electronics > RF, Microwave, Ham Radio

schottkys instead of germanium diodes for crystal radios?

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ali6x944:
schottkys instead of germanium diodes for crystal radios, is it working or a bug I got?

alsetalokin4017:

--- Quote from: ali6x944 on February 07, 2016, 06:37:11 pm ---schottkys instead of germanium diodes for crystal radios, is it working or a bug I got?

--- End quote ---
I've tried it a few times and they can work OK but germanium is better.
Schottky: 1n5711 etc.
Germanium: 1n34a, 1n60, etc.

Ian.M:
Small signal Germanium diodes are usually point contact so have very low junction capacitance.  If substituting a Schottky diode you'd specifically need a low capacitance one designed for RF use.

Macbeth:
Do it properly with a cats whisker ;)

KJDS:
The cheap solution

http://www.infineon.com/dgdl/Infineon-BAT63SERIES-DS-v01_01-en.pdf?fileId=db3a304314dca38901151817843c0df4

Avago and others do expensive zero bias schottky diodes that may be better, but probably not worth teh extra cost for most.

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